[TYPO3-Solr] org/typo3/solr/search/AccessFilter is not assignable to org/apache/lucene/search/Query

[Bernhard Schenkenfelder]

Dear all:

I managed to set up Solr, install the extension, and index all pages.
However, I've run into the following error when calling the URL
http://solr.domain.net:8983/solr/viennahouse_en/select?fl=%2A%2Cscore&fq=siteHash%3A%22856f7d5fe01698db26d58762f42859944a818912%22&fq=%7B%21typo3access%7D-1%2C0&enableElevation=false&qf=content%5E40.0+title%5E5.0+keywords%5E2.0+tagsH1%5E5.0+tagsH2H3%5E3.0+tagsH4H5H6%5E2.0+tagsInline&wt=json&json.nl=map&q=Berlin&start=0&rows=10

java.lang.VerifyError: Bad type on operand stack\nException Details:\n
Location:\n
org/typo3/solr/search/AccessFilterQParser.parse()Lorg/apache/lucene/search/Query;
@8: invokespecial\n Reason:\n Type 'org/typo3/solr/search/AccessFilter'
(current frame, stack[2]) is not assignable to
'org/apache/lucene/search/Query'\n Current Frame:\n bci: @8\n flags: { }\n
locals: { 'org/typo3/solr/search/AccessFilterQParser' }\n stack: {
uninitialized 0, uninitialized 0, 'org/typo3/solr/search/AccessFilter' }

For what it's worth, org.typo3.solr.search.AccessFilterQParserPlugin has
been installed successfully - see screenshot attached.

Also, the URL http://solr.domain.net:8983/solr/viennahouse_en/schema works
just fine.

Any ideas?

Many thanks,
Bernhard